It is designed to do so. Everliker wakes up, makes a few likes and goes to sleep. It will also sleep at night for 8 hours.
It should however consistently deliver the daily quota of likes given that PC does not hibernate and connected to Internet for long enough and your task filtering settings are not too strict (read the trouble-shooting section below if that happens).
If there is no posts for a tag, Everliker will ban the tag from 2 to 24 hours from being run in hope there will be more posts soon.
Realistically this should not slow you down unless you use just one or two tags with a very low number of posts created.
Everliker also won’t be unliking posts automatically as it’s not a natural behaviour.